.u-bg-mute
.u-bg-theme (default)
.u-bg-theme (.t-edu)
.u-bg-theme (.t-lll)
.u-bg-theme (.t-dsgn)
.u-bg-theme (.t-econ)
.u-bg-theme (.t-comp)
.u-bg-theme (.t-scitec)
.u-bg-theme (.t-library)